Question

18-×=×/9 ?????????????

Answer 1

18-х=у/9
х/5+у/3=12

х=18-у/9=(162-у)/9. Теперь это значение х подставим во второе уравнение:
(162-у)/9*5+у/3=12
(162-у)/45+15у/45=12
(162+14у)/45=12
162+14у=540
14у=378
у=27
Значение у подставим в первое уравнение:
18-х=27/9
18-х=3
х=15
Думаю, правильно. Удачи!

Answer 2

To solve for x in the equation 18 - x = x/9, you can follow these steps:

Step 1: Get rid of the fraction by multiplying both sides of the equation by 9 to eliminate the denominator:

9 * (18 - x) = 9 * (x/9)

This simplifies to:

162 - 9x = x

Step 2: Move all terms containing x to one side of the equation and constants to the other side. In this case, let's move the term with x on the left side:

162 - 9x - x = 0

Step 3: Combine like terms:

162 - 10x = 0

Step 4: Now, isolate the term with x by moving 162 to the other side of the equation by subtracting it from both sides:

-10x = -162

Step 5: Finally, solve for x by dividing both sides by -10:

x = -162 / -10

x = 16.2

So, the solution to the equation is x = 16.2.